Air compressor



FIG. 1 is a perspective view of an air compressor showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines depict portions of the air compressor in which the design is embodied that form no part of the claimed design. 

CLAIM The ornamental design for an air compressor, as shown and described. 